/* Jinan University Custom Preloader - Modern Design */

/* ===============================
   PRELOADER CONTAINER
   =============================== */

.jinan-preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #316667 0%, #2a5758 50%, #1e4142 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  opacity: 1;
  transition: opacity 0.6s ease, visibility 0.6s ease;
  font-family: "Roboto", "Open Sans", -apple-system, BlinkMacSystemFont,
    sans-serif;
  box-sizing: border-box;
  overflow: hidden;
}

.jinan-preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* ===============================
   PRELOADER CONTENT
   =============================== */

.preloader-content {
  text-align: center;
  color: #ffffff;
  max-width: 400px;
  padding: 2rem;
}

/* ===============================
   LOGO ANIMATION
   =============================== */

.preloader-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto 2rem;
  position: relative;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(205, 153, 51, 0.3);
  box-shadow: 0 0 30px rgba(205, 153, 51, 0.3),
    inset 0 0 20px rgba(255, 255, 255, 0.1);
}

.preloader-logo img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  filter: brightness(1.1) contrast(1.1);
  animation: logoFloat 3s ease-in-out infinite;
}

/* ===============================
   FLOATING ANIMATION
   =============================== */

@keyframes logoFloat {
  0%,
  100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-10px) scale(1.05);
  }
}

/* ===============================
   ROTATING BORDER ANIMATION
   =============================== */

.preloader-logo::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent,
    #cd9933,
    transparent,
    #cd9933,
    transparent
  );
  animation: rotate 2s linear infinite;
  z-index: -1;
}

.preloader-logo::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  background: inherit;
  backdrop-filter: inherit;
  z-index: 1;
}

.preloader-logo img {
  position: relative;
  z-index: 2;
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* ===============================
   LOADING TEXT
   =============================== */

.preloader-text {
  margin-bottom: 1.5rem;
}

.preloader-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #ffffff;
  letter-spacing: 1px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.preloader-subtitle {
  font-size: 1rem;
  font-weight: 400;
  color: #cd9933;
  opacity: 0.9;
  margin-bottom: 2rem;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
}

/* ===============================
   PROGRESS INDICATOR
   =============================== */

.preloader-progress {
  width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}

.preloader-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #cd9933, #ffdd66, #cd9933);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
  position: relative;
}

.preloader-progress-bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* ===============================
   LOADING DOTS
   =============================== */

.loading-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 1rem;
  gap: 8px;
}

.loading-dot {
  width: 8px;
  height: 8px;
  background: #cd9933;
  border-radius: 50%;
  animation: dotPulse 1.4s infinite ease-in-out;
  box-shadow: 0 0 10px rgba(205, 153, 51, 0.5);
}

.loading-dot:nth-child(1) {
  animation-delay: -0.32s;
}
.loading-dot:nth-child(2) {
  animation-delay: -0.16s;
}
.loading-dot:nth-child(3) {
  animation-delay: 0s;
}

@keyframes dotPulse {
  0%,
  80%,
  100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1.2);
    opacity: 1;
  }
}

/* ===============================
   RESPONSIVE DESIGN
   =============================== */

@media (max-width: 768px) {
  .preloader-content {
    padding: 1rem;
    max-width: 300px;
  }

  .preloader-logo {
    width: 100px;
    height: 100px;
    margin-bottom: 1.5rem;
  }

  .preloader-logo img {
    width: 70px;
    height: 70px;
  }

  .preloader-title {
    font-size: 1.5rem;
  }

  .preloader-subtitle {
    font-size: 0.9rem;
  }

  .preloader-progress {
    width: 160px;
  }
}

@media (max-width: 480px) {
  .preloader-logo {
    width: 80px;
    height: 80px;
  }

  .preloader-logo img {
    width: 60px;
    height: 60px;
  }

  .preloader-title {
    font-size: 1.3rem;
  }

  .preloader-progress {
    width: 140px;
  }
}

/* ===============================
   BODY SCROLL PREVENTION
   =============================== */

body.preloader-active {
  overflow: hidden;
  height: 100vh;
  margin: 0;
  padding: 0;
}

html.preloader-active {
  overflow: hidden;
  height: 100vh;
  margin: 0;
  padding: 0;
}

/* Reset body when preloader is done */
body:not(.preloader-active) {
  overflow: visible;
  height: auto;
}

html:not(.preloader-active) {
  overflow: visible;
  height: auto;
}

/* ===============================
   CONTENT FADE-IN ANIMATION
   =============================== */

.main-content {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.main-content.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* ===============================
   RTL SUPPORT
   =============================== */

html[data-lang="ar"] .preloader-title,
html[data-lang="ar"] .preloader-subtitle {
  direction: rtl;
  text-align: center;
}

/* ===============================
   PREFERS REDUCED MOTION
   =============================== */

@media (prefers-reduced-motion: reduce) {
  .preloader-logo img,
  .preloader-logo::before,
  .loading-dot,
  .preloader-progress-bar::after {
    animation: none;
  }

  .preloader-logo img {
    transform: none;
  }
}

/* ===============================
   HIGH CONTRAST MODE
   =============================== */

@media (prefers-contrast: high) {
  .jinan-preloader {
    background: #000000;
  }

  .preloader-title {
    color: #ffffff;
  }

  .preloader-subtitle,
  .loading-dot {
    color: #ffff00;
    background: #ffff00;
  }

  .preloader-progress-bar {
    background: #ffff00;
  }
}